/Engine/Plugins/Animation/IKRig/Source/IKRigEditor/Public/RigEditor/IKRigAnimInstanceProxy.h
ENDFAnimPreviewInstanceProxyinterfaceFAnimInstanceProxyinterface Called when the anim instance is being initialized. These nodes can be provided
virtual [FAnimNode_Base](API\Runtime\Engine\Animation\FAnimNode_Base) * GetCustomRootNode()